Water-tube-boiler furnace.



P'atented oct. l; |901.

W W SHILLING WATER TUBE BOILER FURNACE.

(Application led Jan. v31, 1901.)

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UNTTED STATES PATENT Carica.

W'ILLIAM VARREN SHILLING, OF SHARON, PENNSYLVANIA.

WATER-TUBE-BOILER FU RNACE.

SPECIFICATION forming part of Letters Patent No. 683,506, dated October1, 1901.

I Application filed January 31,1901. Serial No. 45,46 8. (No model.)

T0 @ZZ w/wm/ t may concern:

Be it known that I, WILLIAM WARREN SHILLING, a citizen of the UnitedStates, residing at Sharon, Pennsylvania, have invented certain new anduseful Improvements in WaterTube-Boiler Furnaces,of which the followingis a specification.

My invention relates to water-tubeboiler furnaces of that class 'inwhich the furnacewall is rectangular in cross-section, within which areconfined two sets of horizontallyarranged boiler-heads connected bystacks of vertically-arran ged water-tubes, the lower heads beingsupported upon fire-arches, below which are located the fire-chambers.

The invention is confined more particularly to the arrangement of thefire-brick, which is built in between the walls of the furnace and thewater-tubes and in between each set of tubes, around the lower ends ofthe same.

To this end the invention includes the arrangement of these bricks toprovide aseries of passages for the arising heated gases, the top of thepassages being closed to deflect said gases through the spaces betweenthe tubes of each stack, the passages formed by the central tier ofbrick extending above the passages formed by the outside tiers.

The invention also includes means inforcing the boiler-heads.

The invention is illustrated in the accompanying drawings, in which-Figure 1 is a vertical sectional view through afurnace embodying myinvention. Fig. 2 is a cross-sectional View. Fig. 3 is a plan view ofone head-strengthening brace. Fig. 4 is an end view of thereinforcing-plate.

The furnace-wall, as shown in Fig. 2, is rectangular in cross-section.Two lire-arches 1 2 extend from front to rear thereof, near the bottomof same, above the ire-chamber,which support the lower heads 3 4,connected by the stacks of tubes 5 6 to the upper heads 7 S, which inturn are connected up in the ordinary manner common in this class offurnaces. Near the upper heads the spaces between the stacks ot' tubes 56 and the adjacent furnace-walls are closed by brick delectors 9 10. Thespace between the stacks of tubes is closed at the top by a brickarrester 11, built between the upper heads of the boilers.

for re- Built between the lower portions of the tubes and the adjacentside walls of the furnace are two tiers of brick 12 13, with theirbottoms flush with the upper faces of the lower boiler-heads. A centraltier of brick 14 is built between the two stacks of tubes and extends adistance above the top of the tiers 12 and 13. Each of said tierscomprises a series of vertical walls, between which are located verticalpassages unobstructed throughout their entire extent, except at the topof the tiers, where they are closed by brick layers 15,16, and 17. Thelayer 17, closing the central tier, is some distance above the layers 15and 16, closing the outside tiers, so that the passages of the centraltier extend to a greater height than the passages in said outside tiers.By this arrangement the heated gases arising from the lire-chambers passthrough the pas sages in said tiers of brick. The gases passing upthrough tiers 12 and 13 are arrested by layers 15 and 16 and forced topass inwardly through the spaces between the tubes of each stack. Asthese spaces are not of sufficient area to accommodate the entire volumeof arising gases, the said gases pass through the same into the passagesin the central tier of brick, commingling with the gases arisingdirectly from the iire through the passages therein. This volume of gasis arrested by layer 17 and forced to again pass through the spacesbetween the tubes of each stack to the space between each stack of tubesand the adjacent furnace-walls. The deflectors 9 10 at the top of thetubes again deiiect the gases inwardly through the spaces between thetubes of each stack, and the arrester 11 causes the gases to again passoutwardly. The tiers of bricknot only serve to twice deflect the heatedgases through the spaces between the tubes of each stack, but they formas well an absorbent medium to retain the heat about said tubes. Y

The boiler-heads used in this class of furnaces each have flat ends anda flat face, into which the tubes are secured. High pressure in theseheads tends to bulge said flat parts outwardly. To counteract thisaction, I have provided reinforcing-pieces. The reinforcing-pieces a forthe iat faces of the boiler comprise lat bars designed to extendtransversely of the part to be reinforced.

The

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bars are provided with bosses through which the bolts to secure the barsin position pass. These bosses are so disposed that theyoccupy the spacecentrally between four tubes, while the web portions of the bars whichconnect the bosses occupy the space between two adjacent tubes. Thebosses have` extensions beyond the edge of the web portions of the barwhich bear 0n the part to be reinforced, and the ends of the bars areprovided with like extensions. rlhe bar thus forms a series ofstrengthening-arches. For the ends of the head the reinforcing-bars aremade of angleiron in substantially the form of the letter H, thecross-pieces passing between the manhole 'in said heads and thepipe-opening.

I Claim- In a water-tube-boiler furnace, the combination with thefurnace-wall, and the two sets of horizontally-arranged boiler-headsaconnected by vertical 'stacks of tubes, of a cen-V tral tier of brickbuilt between the two stacks of tubes, and outside tiers of brickbetween each stack of tubes and the adjacent furnacewall, all of saidtiers having vertical passages in the same, the passages in each tierbeing closed at the top of the latter, said central tier of brickextending above the top of the outside tiers whereby the ascending gaseswill be iirst deflected inwardly through the spaces between the tubes ofeach stack and then outwardly through said spaces, substantially asdescribed.

In testimony whereof I ax my signature in presence of two witnesses.

WILLIAM WARREN SHILLING.

Vvtnesses:

A. W. WILLIAMS,

K. H. BUNDEL.

